Currently the plugin only creates the sandbox for testing changes. I've used it mostly for testing plugin upgrades on e-commerce sites.

Exporting it would be pretty straight forward and I will provide an update with that feature shortly. I'm also looking at what would be involved in adding a comparison capability and then based on the comparison some sort of migration from a sandbox to the live site. Moving changes back into the live site without breaking things could get a little tricky.

Over all a feature for safely migrating from a sandbox to live would be pretty involved and I just wanted to see how much interest there was in the plugin before I adding it.